diff --git a/lib/selectors/nav-selectors.js b/lib/selectors/nav-selectors.js
--- a/lib/selectors/nav-selectors.js
+++ b/lib/selectors/nav-selectors.js
@@ -4,7 +4,7 @@
 import { createSelector } from 'reselect';
 
 import SearchIndex from '../shared/search-index';
-import { threadSearchText } from '../shared/thread-utils';
+import { memberHasAdminPowers } from '../shared/thread-utils';
 import type { Platform } from '../types/device-types';
 import { type CalendarQuery, defaultCalendarQuery } from '../types/entry-types';
 import type { CalendarFilter } from '../types/filter-types';
@@ -77,10 +77,27 @@
   return React.useMemo(() => {
     const searchIndex = new SearchIndex();
     for (const threadInfo of threadInfos) {
-      searchIndex.addEntry(
-        threadInfo.id,
-        threadSearchText(threadInfo, userInfos, viewerID),
-      );
+      const searchTextArray = [];
+      if (threadInfo.name) {
+        searchTextArray.push(threadInfo.name);
+      }
+      if (threadInfo.description) {
+        searchTextArray.push(threadInfo.description);
+      }
+      for (const member of threadInfo.members) {
+        const isParentAdmin = memberHasAdminPowers(member);
+        if (!member.role && !isParentAdmin) {
+          continue;
+        }
+        if (member.id === viewerID) {
+          continue;
+        }
+        const userInfo = userInfos[member.id];
+        if (userInfo && userInfo.username) {
+          searchTextArray.push(userInfo.username);
+        }
+      }
+      searchIndex.addEntry(threadInfo.id, searchTextArray.join(' '));
     }
     return searchIndex;
   }, [threadInfos, userInfos, viewerID]);
diff --git a/lib/shared/thread-utils.js b/lib/shared/thread-utils.js
--- a/lib/shared/thread-utils.js
+++ b/lib/shared/thread-utils.js
@@ -938,34 +938,6 @@
   `contribute to your unread count.\n\n` +
   `To move a chat over here, switch the “Background” option in its settings.`;
 
-const threadSearchText = (
-  threadInfo: RawThreadInfo | ThreadInfo,
-  userInfos: UserInfos,
-  viewerID: ?string,
-): string => {
-  const searchTextArray = [];
-  if (threadInfo.name) {
-    searchTextArray.push(threadInfo.name);
-  }
-  if (threadInfo.description) {
-    searchTextArray.push(threadInfo.description);
-  }
-  for (const member of threadInfo.members) {
-    const isParentAdmin = memberHasAdminPowers(member);
-    if (!member.role && !isParentAdmin) {
-      continue;
-    }
-    if (member.id === viewerID) {
-      continue;
-    }
-    const userInfo = userInfos[member.id];
-    if (userInfo && userInfo.username) {
-      searchTextArray.push(userInfo.username);
-    }
-  }
-  return searchTextArray.join(' ');
-};
-
 function threadNoun(threadType: ThreadType): string {
   return threadType === threadTypes.SIDEBAR ? 'thread' : 'chat';
 }
@@ -1439,7 +1411,6 @@
   identifyInvalidatedThreads,
   permissionsDisabledByBlock,
   emptyItemText,
-  threadSearchText,
   threadNoun,
   threadLabel,
   useWatchThread,